* {
    padding: 0px;
    margin: 0px;
}

body {
    font-family: Arial, sans-serif;
    margin: 0 auto;
    padding: 0;
    background-color: rgb(231, 175, 20);
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 20px 20px;
    text-decoration: none;
}

li a:hover:not(.active) {
    background-color: #111;
}

.active {
    background-color: #6ece32;
    padding: 20px;
}

.featured-dish {
    text-align: center;
}

.dish {
    display: inline-block;
    margin: 20px;
}

.dish img {
    width: 100%;
    max-width: 200px;
    height: 200px;
    object-fit: cover;
}

.featured-dish h2 {
    position: absolute;
    margin: 28px 0px 0 30px;
    /* 之前的 */
    margin: 51px 0px 0 901px;
    /* 机房 */
}

.one {
    top: 445px;
    /* 原 */
    top: 495px;
    /* 机房 */
    left: 18%;
    /* 机房 */
    border: 2px solid rgb(231, 175, 20);
    padding: 10px 4px;
    background: #d8f825;
    width: 1250px;
    /* 后续需做适应性修改 */
    height: 300px;
    border-radius: 25px;
    position: absolute;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.personal_bar {
    float: right;
}

.userbox {
    position: fixed;
    text-align: center;
    display: none;
    background-color: whitesmoke;
    width: 96px;
    z-index: 1;
}

.user,
.signoff {
    width: auto;
    padding: 10px;
    cursor: pointer;
    border: solid 1px black;
}

#index_frame {
    width: 100%;
    height: 100%;
    display: block;
    overflow: hidden;
}

#introduction_frame {
    width: 100%;
    height: 100%;
    display: none;
}

#snakelist_frame {
    width: 100%;
    height: 100%;
    display: none;
}